Water absorbing and retaining material

Abstract

Abstract PURPOSE:A water absorbing and retaining material, prepared by coating a porous base material with a solution containing a specific maleic acid copolymer and a crosslinking agent, drying and heat-treating the resulting base material, having a high water absorption rate and improved durability, and suitable for agricultural, forestry, horticultural uses, etc. CONSTITUTION:A water absorbing and retaining material prepared by coating or impregnating a porous base material, e.g. a non-woven fabric, with a solution obtained by adding a necessary amount of an alkali metallic compound, e.g. NaOH, or ammonia to a solution containing a maleic acid copolymer dissolved therein under stirring, and containing 100pts.wt. maleic acid copolymer having 40-90mol% carboxyl groups in the form of an alkali metallic or ammonium salt and <=10pts.wt. crosslinking agent, e.g. polyethyleneimine, and drying and heat- treating the resultant base material at 80-200 deg.C.

Inventors

• 👤 Yoshihiro Yoshioka
• 👤 義紘 吉岡
• 👤 Hirotoshi Miyazaki
• 👤 宮崎　弘年
• 👤 Hiroshi Harima
• 👤 針間　浩

Bibliographic Details